Extension oven



Feb. 13, 1923. 1,445,357.

M. R l T Z E R.

' EXTENSION OVEN.

FILED MAR. 27, 1922.

e. i r

MAX EITZEPU, OF IVIUNICI-I, GERMANY, ASSIGNCR OF ONE-HALF TO TIMOTHY F. MULLEN, OF CHICAGO, ILLINOIS.

EXTENSION OVEN.

Application filed March 27, 1922. Serial No. 547,107.

To all 20/1 0m it may conccwt:

Be it known that 1, MAX Rrrznii, a citizen of Germany, residing'at Munich, Bavaria, Germany, have invented a certain new and. useful Improvement in Extension Ovens, of which the following is a specification.

My invention relates to extension ovens, and the object is to provide simple and efficient means for detachably supporting the oven in front of the ire door of stoves of various types, especially domestic heating stoves. It my purpose to make the oven readily detachable so that it may be kept in place only. during the actual cooking or heating, after which. it may be removed. It will be understood that domestic heating stoves are of different sizes and designs, and one of my objects is to render the supporting means adjustable so that the oven may be appliedto-stoves of different makes, designs, and sizes.

I accomplish these objects by the mechanisms illustrated in the accompanying drawings, in which Figure 1 is a perspective view of the oven, showing the same mounted in position upon the stove.

Figure 2 is a perspective view of the fire door of the stove, together with the oven supporting mechanism.

Figure 3 is a perspective view of the inner end of the oven.

Like numerals denote parts like. parts th ruout the several views.

The oven body 1 may assume various form and designs but in the instance selected to illustrate the invention is in the form of a rectangular prism. having a lid 2 and a duct 3 projecting from its inner end and designed to project into the fire door opening. It is preferably rectangular in cross section and has an opening 4; at the inner end for admitting the heat. Stoves, of course, are variously constructed, but in the more or less diagrammatic representation illustrated, the stove has a fire door casing 6 adapted to be closed by a hinged door 7.

The special mechanism by which the oven is held in place is illustrated at the right portion of Fi ure 2 and is shown in operation the left end of Figure 1, It has a foot bracket which, according to the illustrated construction, is formed of asingle piece of metal and has a horizontal flange 9 adapted to seat upon the lower horizontal portion of the door casing and a vertical flange 10 adapted to engage the front of the stove. It also has a tubular portion 11, extending longitudinally, which is open at the ends to receive the horizontally bent ends of supporting levers 12. The levers are thus pivotally and. detach ably connected to the foot bracket and capable of swinging independently in parallel vertical planes. In. use the levers extend. obliquely upward and inward and engage the top inner corner of the fire door opening, as shown at the left end. of Figure 1. Attached to these arms or levers are two side pieces 14 which are here shown in the form of quadrants having a series of notches 15 intheir arcuate upper edges.

They. are adapted to receive and support the projecting ends of a supporting bar 16 which extends thru the oven near the upper forward end thereof.

In operation,.when it is. desiredto apply the oven to the stovethe upper ends of the levers 12 are inserted thru the door casing (3 and brought into contact with. the inner upper corner. of the door casing. The foot bracket 9. 10 is then adjusted. to the sill of the door casing with. the. flange 10 in contact with the front ofthe stove, and the bent ends of the levers 12 inserted into the ends of the tubular: portion. 11. The oven is then brought forward into close contact with the front of the stove after which the supporting bar 16 is lowered into the appropriate notch 15 in the side pieces 14;. The weight of the oven will thereupon be carried by the bar and side pieces. The lower end of the oven abutting the foot bracket or front of the stove. Thus the oven is held snugly in contact with the front of the stove at the fire door opening. Conversely. when it is desired. to detach the oven, all that is necessary is to lift it up, so that the supporting bar will leave the notches. The levers and side pieces may then be taken away. So long as the oven remains in place, the stove may serve both for cooking and for heating" purposes.

It will be understood that the apparatus may he somewhat varied Without departing from the spirit oi? the invention. For example, it is not essential that the bar l6 be continuous from. end to end and pass t-hru the even, as separate pins projecting from the sides of the oven may be employed. A single bar is preferable, however, as it facilitates the handling of the apparatus by a single person.

It will be noted that the attaching frame willalways hold the oven in close contact with the stove regardless of the depth of the door casing; also that my construction prevents any appreciable amount of leakage from the stove into the room. The contact is close at the top and bottom of the tire door opening and the side pieces 14-, which are shown in the liorm of plates, project both into the door raising and extend tor some distance along the sides of the oven, thus making a seal at the sides. The result is that the gases are retained. in the stove, and the stove will operate to all intents and purposes as if the even. were absent and the stove door closed.

It will be evident that my invention makes it possible, where fuel is scarce, to take full advantage of the heat or the fuel both for heating and cooking. At the same time the method of attachment is so simple that the oven need remain in place only when required for use. Furthermore, no change is required in the construction of the stove, and the presence of the oven does not in any way change the operation of the stove, nor reduce the efficiency. I

It will be evident that the formationot' the inner end of the furnace has nothing particular to do with the principle of opera tion. of the attaching means or the mechanism by which the oven is supported. Consequently, the-formation and location oi? the duct '3 may be greatly varied without departing from the spirit of the invention, and in. fact, may be Wholly dispensed with, if desired.

Having thus described my invention, what l claim as new and desireto secure by Letters Patent is:

1. An extension oven adapted to be supported at the fire door of astove, said oven having a bracket adapted to seat upon the sill of the fire door casing, levers pivoted to said bracket and adapted to engage the fire door casing at a point remote from the sill, and

means for detachably supporting the even "from said levers.

2. The combination, With an extension oven having an air opening at the inner end, of a separate attaching frame adapted to support the even outside of the stove and having a foot bracket adapted to rest upon the door sill and engage the front edge oi. it, and a lever pivoted to the bracket and adapted to engage the inner edge of the door casing at the top thereof, the oven beingadapted to seat upon said bracket, and means for securing the upper portion of the oven to the lever at a point above the foot bracket.

2. The combination, with an extension oven, oi? a frame adapted to be supported upon the lire door casing o l. a stove, said frame having side pieces with an arcu ate up per edge having notches therein, and means projecting from the sides of the oven and adapted to rest in said notches.

i. In a device of the class described, afoot bracket having a horizontal and a vertical flange, 2. pair of upstanding arms pivoted to said bracket, arcuate side pieces fastened to said levers and having apertures arranged concentric with the arm pivots, an oven body, and means extending from the oven body adapted to enter different apertures in the side pieces for holding the oven body in horizontal position regardless of the angle of inclination of the levers.

In witness whereof, I have hereunto subscribed my name.

i MAXRITZER.

Witnesses OOHE Sons, 1%. D. Murmur. 

